Introduction to H.264 Advanced Video Compression
Download as PPT, PDF26 likes12,081 views
The document discusses H.264 advanced video compression. It provides an agenda that covers what H.264 is, how it works through prediction, transform and quantization techniques, its syntax, examples, and going deeper into its implementation. H.264 is widely used for video compression in broadcast digital TV, DVDs/Blu-Rays, IPTV, web video and mobile video. It works by predicting pixels from previous frames, applying transforms and quantization to remove redundant information, and using entropy coding techniques to further compress the data. The document provides resources to learn more about H.264 standards, implementations, and extensions.
Introduction to H.264 Advanced Video Compression
- 1. An introduction to H.264 Advanced Video Compression Iain Richardson 22 nd March 2010 V CODEX
- 2. Agenda 1. What is H.264 Advanced Video Compression? 2. How H.264 works - prediction - transform + quantization - coding 3. The H.264 syntax 4. Examples 5. Going deeper
- 3. Agenda 1. What is H.264 Advanced Video Compression? 2. How H.264 works - prediction - transform + quantization - coding 3. The H.264 syntax 4. Examples 5. Going deeper
- 4. Video compression H.264 MPEG-4 MPEG-2 Broadcast Digital TV DVD / Blu-Ray IPTV Web Video Mobile Video …… ……
- 7. Agenda 1. What is H.264 Advanced Video Compression? 2. How H.264 works - prediction - transform + quantization - coding 3. The H.264 syntax 4. Examples 5. Going deeper
- 8. Digital video Displayed frame Luma (Y) Chroma (Cb) Chroma (Cr)
- 9. Macroblock
- 10. H.264 Encoder
- 11. H.264 decoder
- 12. Prediction
- 13. Intra prediction
- 15. Inter prediction
- 17. H.264 Encoder
- 20. Forward Quantize
- 21. Forward Transform + Quantize Block of samples Integer transform Quantized, QP=18 961 -41 15 -48 -34 72 -30 -104 -15 3 15 24 13 81 -5 8 58 64 51 58 52 64 56 66 62 63 61 64 59 51 63 69 48 -1 0 -1 -1 1 -1 -2 0 0 0 0 0 1 0 0
- 22. Inverse Quantize
- 24. Block of samples Quantized, QP=18 Rescaled + inverse transformed 58 64 51 58 52 64 56 66 62 63 61 64 59 51 63 69 48 -1 0 -1 -1 1 -1 -2 0 0 0 0 0 1 0 0 55 66 54 58 54 62 58 63 61 59 61 62 60 55 65 67
- 25. About the Integer Transform 1-D Discrete Cosine Transform 1-D Integer Transform 1 1 1 1 2 1 -1 -2 1 -1 -1 1 1 -2 2 -1 0.5 0.5 0.5 0.5 0.6532… 0.2706… -0.2706… -0.6532… 0.5 -0.5 -0.5 0.5 0.2706… -0.6532… 0.6532… -0.2706…
- 26. H.264 Encoder
- 27. Entropy coding Headers Prediction parameters Quantized coefficients Fixed length codes Exp-Golomb codes Context Adaptive Variable Length Codes Context Adaptive Binary Arithmetic Codes
- 28. Agenda 1. What is H.264 Advanced Video Compression? 2. How H.264 works - prediction - transform + quantization - coding 3. The H.264 syntax 4. Examples 5. Going deeper
- 32. …… etc
- 34. Agenda 1. What is H.264 Advanced Video Compression? 2. How H.264 works - prediction - transform + quantization - coding 3. The H.264 syntax 4. Examples 5. Going deeper
- 37. intra inter (forward) skip
- 39. Agenda 1. What is H.264 Advanced Video Compression? 2. How H.264 works - prediction - transform + quantization - coding 3. The H.264 syntax 4. Examples 5. Going deeper
- 40. Going deeper… Prediction, transform, coding in detail Parameters, profiles, levels Optimizing H.264 Implementing H.264 Extensions – Scalable Video Coding, Multiview Video Coding Configurable Video Coding
- 41. To find out more http://www.itu.int - Download the H.264 standard http://www.vcodex.com - Free tutorials http://iphome.hhi.de/suehring/tml/ - JM reference software http://www.elecard.com/ - StreamEye analyser http://www.dc ktn .org.uk - Digital Communications Knowledge Transfer Network http://tinyurl.com/h264book2 - My new book…